Tools

GPX

• GPX Merge
• GPX Simplifier
• SAC Routeportal GPX Downloader

Image Manipulation

• Exgif - Online Image Editor - GIF maker and image editor (video to GIF, resize, rotate, crop, etc.)
• Image Magick thumbnail generation

convert 0.jpeg -thumbnail 400x400^ -gravity center -strip -quality 95  PNG8:thumbnail.png